The Dyapdid Sea and its tributaries are the warmest waters on all Devonia. Not only is this a tropical sea, but underwater volcanic activity makes some areas of the sea literally boil. The Dyapsid is known for being home to many sea snakes and other reptiles. Stories abound of reptilian beasts that can threaten even the largest of ships. Swamps and rivers of the western shore are rumored to harbor mysterious creatures long gone from the rest of Devonia, and the northern shore is a haven for any number of dragons.
The large volcanic island in the middle of the Dyapsid is known as Cretacea and harbors almost no life save reptiles, many of which can be found nowhere else on Devonia. This island is ruled by the Dragonborn and is the one place on Devonia where they number more than all the other races. According to legend, Cretacea is the ancestral home of the Dragonborn and the seat of their ancient fallen empire, as evidenced by the ancient and mysterious ruins that dot the landscape.